GRP (14-27) (human, porcine, canine)

O=C([C@H]1N(CCC1)C([C@@H](NC([C@@H](N)CCSC)=O)CC2=CC=C(C=C2)O)=O)N[C@@H](CCCNC(N)=N)C(NCC(N[C@@H](CC(N)=O)C(N[C@@H](CC3=CN=CN3)C(N[C@H](C(N[C@@H](C)C(N[C@@H](C(C)C)C(NCC(N[C@H](C(N[C@@H](CC(C)C)C(N[C@H](C(N)=O)CCSC)=O)=O)CC4=CN=CN4)=O)=O)=O)=O)CC5=CNC6=CC=CC=C56)=O)=O)=O)=O

[1]J B Fischer, et al. The bombesin receptor is coupled to a guanine nucleotide-binding protein which is insensitive to pertussis and cholera toxins. J Biol Chem. 1988 Feb 25;263 (6) :2808-16.